Definition of redundancy noun from the Oxford Advanced American Dictionary

 

redundancy

 noun
noun
NAmE//rɪˈdʌndənsi//
 
[uncountable](formal or technology)
 
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the state of not being necessary or useful Natural language is characterized by redundancy (= words are used that are not really necessary for someone to understand the meaning).
See the Oxford Advanced Learner's Dictionary entry: redundancy